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(WTF!) SGS2 Runs out of battery while streaming video via the Samsung MHL-HDMI??

Discussion in 'Android Devices' started by smileman, Sep 14, 2011.

  1. smileman

    smileman Well-Known Member
    Thread Starter

    This is a serious hit: the SGS2 doesn't recharge fast enough to compensate for the battery drain when I play video via the MHL-HDMI cable to my TV, even though the MHL-HDMI cable requires that the power adapter be plugged into it while in use.

    I assume this is happening because (stupidly) the SGS2 has to keep the screen on while using the MHL-HDMI cable, otherwise whatever is streaming stops outputting.

    Has anyone else had this experience?

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  2. uktivo

    uktivo Well-Known Member

    I've not had this problem, although I know use all share and stream via my media steamer
  3. NZtechfreak

    NZtechfreak Android Expert

    This is a known problem that the charge trickles down despite the charging input.

    I use my Mugen Extended Battery for longer MHL sessions, there are a number of extended battery options out there that might be worth exploring.
  4. frankkduf2

    frankkduf2 Newbie

    I had this issue while playing a game before i upgraded 2.3.4 now it is resolved
  5. DaveSyd

    DaveSyd Android Enthusiast

    What is the power rating of the charger? Some acre only 500mA or 750mA. If you have a higher rated one r them it should fix the problem? Maybe 1000 or even 1500mA. Sanger voltage of course
  6. NZtechfreak

    NZtechfreak Android Expert

    A higher input charger perhaps could solve this, although I'd be worried about the safety of doing that.
  7. smileman

    smileman Well-Known Member
    Thread Starter

    i have a mac and therefore can't root or even upgrade the baseband.

    the Kies desktop version for Mac bits, btw. getting a large avi file transfered over from my MacBook Air (rev B, no SD card slot) to the SGS2 was a major pain. but since my SGS2 will die before i can finish a movie not sure there is much point to the MHL cable anyway.

    why didn't they design it so you can turn the screen off while using MHL?
  8. smileman

    smileman Well-Known Member
    Thread Starter

    i'm using the stock charger
  9. Hodsgod

    Hodsgod Newbie

    I assume the brightness is adjusted to its lowest level?
  10. Gearu

    Gearu Android Expert

    Maybe put the phone in aeroplane mode to kill the 3g and data connections, and make sure wifi and all of the gps settings are off?
  11. lotus49

    lotus49 Android Expert

    There's no point. The SGS2 caps the current it will draw to 600mA on USB cable or 750mA on a mains charger. Plugging it into a higher powered charger won't make any difference unfortunately.
  12. denwa

    denwa Lurker

    Wow, I finally found some info on this. Thought it was just me.

    There are supposed to be some rooted kernels that can increase current draw but I don't know how to change the current draw on these kernels in a safe manner.

    Pretty crazy that samsung has this problem stock, especially when they are releasing TV's that are supposed to charge the phone though an hdmi/mhl cable.

    I notice too that the cpu seems to max out during video playback so it's not just the screen being on.

    This doesn't seem to be much of a priority on xda yet since so few havethe cables but now that you can get them for $15 off ebay and netflix released there app for all 2.3+ phones.. it soon will be.
  13. tksvv

    tksvv Lurker

    I have used the phone to watch movies (2.5 hrs long) via MHL cable while on stock ROM and now cognition 1.5.1. I always see an increase in the charge percentage after the movie has completed playing. So there may be a problem with your settings.. I use juice defender which shuts down data/wifi if not used and so on...

Samsung Galaxy S2 Forum

The Samsung Galaxy S2 release date was April 2011. Features and Specs include a 4.3" inch screen, 8MP camera, 1GB RAM, Exynos 4210 Dual processor, and 1650mAh battery.

April 2011
Release Date

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